Oil-guard for commutators.



Patented Nov. 1 5, |902'.A

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(nesses: a?? MW S'ri-rrqns PATENT OFFICE.

UNiTa IVILLIAM F. DAVSON, OF SCHENECTADY, NEV ASSIGNOR TO GENJ ERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

VOIL-GUARD FOR COMMUTATORS.

SPECIFICATION forming part of Letters Patent N o. 714,158, dated November 25, 1902'.

Application filed April 23,1902. Serial No.104,291. (No model.)

To all whom t may concern,.- V joints between the ends of the ring-segments Be it known that I, WILLIAM F. DAWSON, through which oil can pass. a citizen of the United States, residing at My invention consists, first, in a barrier Schenectady, county of Schenectady,`State of cast integral with the spider-arms and con- 55 New York, have invented certain new and sisting of a web 8, concentric with the shaft useful Improvements in Oil-Guards for Comand extending from arm to arm entirely mutators, (Case No. 2,506,) of which the folaround the spider. To each edge of this web lowing is a specification. is bolted an integral annular flange 9,extend This invention' relates to dynamo-electric ing outwardly to a plane of revolution beyond 6o ro machines, and especially to generators conthe end of the commutator and terminating nected directly to steam-engines or other in a smooth edge, preferably having agroove prime movers. In these machines serious l0 in it. The flange may be steadied by adtrouble frequently occurs, owingto the leakjusting-bolts 11 entering the clamping-rings ing of oil from the shaft-bearings, eccent-rics, 4. The joints between the flanges and the 65 15 crank-pins, or other lubricated parts and its web are preferably rabbeted and are maworkinginto the commutator, where it causes chined to give a close lit. The oil escaping the insulation to deteriorate, so that in time along the arms of the spider will be stopped the machine burns out. The creeping of the by the web 8 and compelled t0 flow out over oil into the commutator is owing to the centhe flanges, from whose edges it flies off by '7o zo trifugal force of the rotating parts and the centrifugal force in lines which carry it clear outward radial suction of air due to the fan of the colnmutator. Any oil remaining on action of the commutator-leads and armathe edges of the fianges when the machine ture-spider. stops will not be able to run down inside the Myinvention aimsto divert the oilinits pf-isflanges, but will be caught in the grooves 10 75 z5 sage to the commutator and throw it by cenand will follow them around to the lower side trifugal force away from the machine. of the flanges and drop off.

In the accompanying drawings, Figure l is In the older style of commutator (shown in a cross-section of a certain construction of Fig. 2) the segmental rings 12 are movable commutator embodying my invention. Fig. readily to clamp` the commutator-segments l 8o 3o 2 is a similar view of a modification. by means of short wedge-blocks 13, inserted at Referring first to Fig. l, the commutatorm intervals between the rim 14 ofthe spider segments l are mounted on the cylindrical and the inner fiange 15 of the ring and adrim 2 of a spider, one of whose arms is shown justed by screw-bolts 16. The oil following at 3. The segments are clamped to the rim out along the spider-arms 17 finds easy ac- 85 by clamping-rings 4, located one at each end cess between the ends of the wedge-blocks to of the segments and forced against them by the joints between the rim and the clampingbolts 5 entering said rim. The clampingrings, and so to the insulation by which the rings have cylindrical inner flanges 6, fitting coinmutator-segments are surrounded. In the cylindrical inner surface of the rim, and this style of machine I use the same barrier- 9o 4o beveledouterflanges7,fittingbeveled grooves web 8 on the spider-arms and the curved in the ends of the commutator-segments. Inflanged rings 9 with rabbeted joints and sulation is interposed between the segments grooved edges. and the rim and clamping-rings, as indicated By means of this simpleaddition to the comby the heavy black lines. mutators of dynamo-electric machines I am 95 Ordinarily the oil follows out along the spiable to almost wholly exclude oil from the der-arms and works through the joints becommutator. tween the flanges and the rim, and so gains What I claim as new, and desire to secure access to the commutator. This operation is by Letters Patent of the United States, isaggravated by the fact that the clampingl. The combination with the com mutator roo 5o rings are made segmental to facilitate repair- -of a dynamo-electric machine, of an annular ing the commutator, thus leaving wide radial oilguard attached to the commutator supportand extendingradiallyontward toaplane of revolution beyond said commutator.

2. The combination With the commutator of a dynamo-electric machine, of a hanged ring attached to the commutator-support and extending outward to a plane of revolution beyond the end of said cominutator.

3. The combination With the commutator of a dynamo-electric machine, of a hanged ring connected with the commutator-support by a rabbeted joint, and extending outward to a plane of revolution beyond the end of said commutator.

4C. The combination With the conimutator of a dynamo-electric machine, of an annular oil-guard attached to the commutatorsupport and having a grooved edge lying,r in a plane of revolution beyond the end of said commutator.

5. The combination with the comm ntatorof a dynamo-electric machine, of Ya spider supporting the same, a web integral With the spidenarrns and concentric With the shaft,

and an annular oil-guard attached to said Web.

6. The combination With the commutator of a dynamo-electric machine, of a spider supporting the sanne, a Web integral with the spider-arms and concentric with the shaft, and an annular oil-guard attached to said web bya rabbeted joint and having a grooved edge.

7. Means for'protecting the commutator of a dynamo-electric machine from oil, consisting of a Web integral With the arms of the spider supporting said comrnntator, and a flanged ring fastened to said web by a tight joint and extending out to a plane of revolution beyond the end of the commntator.

In Witness whereof I have hereunto set my hand this 21st day of April, 1902.

WILLIAM F. D AVVSON.

Witnesses:

BENJAMIN B. HULL, HELEN ORFoRD. 

